Rotor, permanent magnet synchronous motor and compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a rotor, which comprises a rotor iron core provided with a rotating shaft mounting hole and a plurality of refrigerant through holes. An annular arrangement area is formed on the periphery of the rotating shaft mounting hole, the multiple refrigerant through holes are all located in the annular arrangement area, the sides, close to the rotating shaft mounting hole, of the refrigerant through holes are attached to the inner periphery of the annular arrangement area, and the sides, away from the rotating shaft mounting hole, of the refrigerant through holes are attached to the outer periphery of the annular arrangement area; the diameter of the rotating shaft mounting hole is D1, the inner diameter of the annular setting area is D2, the outer diameter of the annular setting area is D3, and D2 is larger than or equal to D1 + 3 and smaller than or equal to (D3 + D1) / 2. The utility model has the following technical effects: by setting the distance and the relative position relationship between the refrigerant through hole and the rotating shaft mounting hole, the refrigerant through hole is closer to the rotating shaft mounting hole, so that the refrigerant through hole and the exhaust hole on the pump body assembly are staggered, the brought-out of lubricating oil is reduced, and a stable oil liquid level is kept. The utility model also discloses a permanent magnet synchronous motor and a compressor.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field, concretely relates to a rotor, permanent magnet synchronous motor and compressor. BACKGROUND

[0002] The compressor usually includes the outer shell body, is equipped with motor and pump body assembly etc. in the outer shell body interior. The compressor will experience the process that the refrigerant is transported from the compressor bottom to the compressor upper portion in the operation process, because the bottom of the compressor stores the lubricating oil, in the process that the refrigerant flows, will inevitably carry part lubricating oil and discharge, therefore, how to reduce the take-out amount of lubricating oil as far as possible to stabilize the oil level of the compressor becomes the key.

[0003] The existing compressor structure, the refrigerant through hole on the motor rotor is usually opposite to the exhaust hole position on the pump body assembly, thereby forming the direct current refrigerant passage, because the smoothness of the refrigerant passage is higher, cannot play the blocking action to the lubricating oil carried by the refrigerant, therefore, leads to the lubricating oil to be taken out in large quantities, causes the loss of lubricating oil, influences the operation reliability of the compressor, simultaneously, the large amount of lubricating oil particles discharged flow to the compressor outside through the exhaust pipe, will accumulate on the heat exchanger surface, influences the heat exchange efficiency, thereby influences the operation performance of the compressor. SUMMARY

[0004] In order to solve the insufficient of the prior art, the utility model provides a rotor, through setting the distance and relative position relation between the refrigerant through hole and the shaft mounting hole, make the position of refrigerant through hole more close to the shaft mounting hole than prior art, thereby form the misplacement with the exhaust hole on the pump body assembly, further play the blocking action to the lubricating oil carried by the refrigerant, effectively reduce the take-out amount of lubricating oil, to keep the oil level is more stable, guarantee the operation stability and reliability of the compressor. The utility model also provides a permanent magnet synchronous motor and compressor.

[0005] The technical effects achieved by the utility model are realized through the following technical aspects:

[0006] Firstly, the utility model provides a rotor, including rotor core, the rotor core is equipped with shaft mounting hole and multiple refrigerant through holes, the shaft mounting hole is located the axle position of rotor core, multiple refrigerant through holes are distributed around the outer periphery of shaft mounting hole;

[0007] The outer periphery of the shaft mounting hole forms an annular setting area, multiple refrigerant through holes are all located in the annular setting area, and the side of the refrigerant through hole close to the shaft mounting hole is attached to the inner periphery of the annular setting area, and the side of the refrigerant through hole away from the shaft mounting hole is attached to the outer periphery of the annular setting area;

[0008] The rotor has a relationship: D1+3≤D2≤(D3+D1) / 2.

[0009] As a further description of the utility model technical scheme, the total area of the plurality of refrigerant through holes is S, and the rotor has a relationship: 0.393×D2 2 <S<0.393×(D2+D3) 2 .

[0010] As a further description of the utility model technical scheme, the number of the refrigerant through holes is N1, and the N1≥4.

[0011] As a further description of the utility model technical scheme, the shape of the refrigerant through hole is polygonal.

[0012] As a further description of the utility model technical scheme, the rotor core is circumferentially provided with a plurality of magnet grooves, and the refrigerant through hole is located between the rotating shaft mounting hole and the magnet groove.

[0013] As a further description of the utility model technical scheme, the magnet groove is V-shaped.

[0014] As a further description of the utility model technical scheme, the number of the magnet groove is N2, and the rotor has a relationship: 8≤N2≤10.

[0015] As a further description of the utility model technical scheme, the rotor core is further provided with a magnetic separation groove, and the magnetic separation groove is located between the magnet groove and the outer circumferential surface of the rotor core.

[0016] Secondly, the utility model provides a kind of permanent magnet synchronous motor, including stator, rotating shaft and the rotor, the stator is sleeved in the outside of the rotor, the rotating shaft is arranged in the rotating shaft mounting hole.

[0017] Thirdly, the utility model provides a kind of compressor, including pump body assembly and the permanent magnet synchronous motor, and the pump body assembly is connected with the rotating shaft.

[0018] Summarized above, the utility model at least has following beneficial effects:

[0019] The rotor provided by this utility model, by setting the distance and relative position relationship between the refrigerant through-hole and the shaft mounting hole, makes the position of the refrigerant through-hole closer to the shaft mounting hole than in the prior art, thus creating a misalignment with the exhaust port on the pump body assembly. During the process of the refrigerant being discharged from the pump body assembly and entering the rotor, it will cause a certain impact on the lubricating oil carried by the refrigerant, slowing down the flow rate of the lubricating oil and thus blocking the lubricating oil, effectively reducing the amount of lubricating oil carried out, maintaining a relatively stable oil level in the compressor, ensuring the compressor's operational stability and reliability, and improving the compressor's operating performance.

[0020] The permanent magnet synchronous motor provided by this utility model, by setting the above-mentioned rotor, changes the position of the refrigerant passage on the permanent magnet synchronous motor, so that the connection between the refrigerant passage on the permanent magnet synchronous motor and the refrigerant passage on the pump body assembly forms a certain bend, thereby blocking the lubricating oil carried by the refrigerant, reducing the discharge of lubricating oil, stabilizing the oil level of the compressor, and thus improving the operating performance of the compressor.

[0021] The compressor provided by this utility model optimizes the refrigerant passage inside the compressor by setting the aforementioned permanent magnet synchronous motor, effectively reducing the loss of lubricating oil and improving the stability of the oil level inside the compressor, thereby ensuring the reliability of compressor operation and improving compressor performance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of the rotor in Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the cross-sectional structure of the rotor in Embodiment 2 of this utility model;

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the permanent magnet synchronous motor of Embodiment 3 of this utility model;

[0025] Figure 4 This is a partial cross-sectional view of the compressor of Embodiment 4 of this utility model.

[0026] Marked in the image:

[0027] 1. Rotor core; 11. Shaft mounting hole; 12. Refrigerant through hole; 13. Annular zone; 14. Magnet slot; 15. Magnetic isolation slot;

[0028] 100, Stator; 200, Rotating Shaft; 300, Rotor; 400, Pump Body Assembly; 500, Permanent Magnet Synchronous Motor. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] refer to Figure 1 The rotor provided in this embodiment includes a rotor core 1. The rotor core 1 has a shaft mounting hole 11 and a plurality of refrigerant through holes 12. The shaft mounting hole 11 is located at the axial center of the rotor core 1, and the plurality of refrigerant through holes 12 are evenly distributed around the outer periphery of the shaft mounting hole 11. An annular region 13 is formed on the outer periphery of the shaft mounting hole 11. The plurality of refrigerant through holes 12 are all located within the annular region 13, and the side of the refrigerant through hole 12 closest to the shaft mounting hole 11 is fitted with the inner periphery of the annular region 13, while the side of the refrigerant through hole 12 furthest from the shaft mounting hole 11 is fitted with the outer periphery of the annular region 13.

[0033] The diameter of the shaft mounting hole 11 is D1, the inner diameter of the annular section 13 is D2, and the outer diameter of the annular section 13 is D3. The rotor has the following relationship: D1+3≤D2≤(D3+D1) / 2. It is understood that in the prior art, the refrigerant through-hole and the exhaust port of the pump body assembly are positioned opposite each other, and both are relatively far from the motor's rotating shaft. By setting the distance and relative position between the refrigerant through-hole 12 and the shaft mounting hole 11 using the above relationship, the position of the refrigerant through-hole 12 can be made closer to the shaft mounting hole 11 than in the prior art, thus creating a misalignment with the exhaust port on the pump body assembly. When the refrigerant is discharged from the exhaust port of the pump body assembly, the lubricating oil carried by the refrigerant will first impact the end face of the rotor core 1, and then enter the refrigerant through-hole 12, thereby hindering the flow of lubricating oil, effectively reducing the amount of lubricating oil carried out, maintaining a relatively stable oil level in the compressor, ensuring the compressor's operational stability and reliability, and improving the compressor's operating performance.

[0034] In some embodiments, the total area of ​​the plurality of refrigerant through holes 12 is S, and the rotor has the relationship: 0.393 × D² 2 <S<0.393×(D2+D3) 2It is understandable that the total area of ​​the multiple refrigerant through holes 12 refers to the total area of ​​the multiple refrigerant through holes 12 on the same cross-section. By setting the total area of ​​the multiple refrigerant through holes 12 through this relationship, the total area of ​​the refrigerant through holes 12 is reasonably increased. The increase in the total area of ​​the refrigerant through holes 12 allows the refrigerant to carry more heat. When the heat carried by the refrigerant increases, the temperature of the lubricating oil will decrease accordingly, resulting in an increase in the viscosity of the lubricating oil and a decrease in its fluidity. This, in turn, weakens the ability of the lubricating oil to flow with the refrigerant and further reduces the discharge of lubricating oil.

[0035] As a further optimization, the number of refrigerant through holes 12 is N1, preferably N1≥4. In this embodiment, N1 is 6. By reasonably increasing the total area of ​​the refrigerant through holes 12 and appropriately increasing the number of refrigerant through holes 12, the refrigerant can carry away more heat, which is beneficial to enhancing the internal circulation of the motor and improving the motor's operating efficiency.

[0036] In some embodiments, the refrigerant through-hole 12 is polygonal in shape. In this embodiment, the refrigerant through-hole 12 is approximately an isosceles trapezoid. This shape provides strong load-bearing capacity, enabling it to withstand greater refrigerant pressure and flow, ensuring the stability and durability of the rotor under high-speed operation. Simultaneously, it enables efficient conversion between rotational and linear motion, promoting stable and efficient refrigerant flow and thus improving motor efficiency.

[0037] In this embodiment, the rotor, by setting the distance and relative position relationship between the refrigerant through-hole and the shaft mounting hole, makes the position of the refrigerant through-hole closer to the shaft mounting hole than in the prior art. This creates a misalignment with the exhaust port on the pump body assembly, thereby blocking the lubricating oil carried by the refrigerant, effectively reducing the amount of lubricating oil carried out, stabilizing the compressor oil level, ensuring the compressor's operational stability and reliability, and thus improving the compressor's operating performance. By reasonably increasing the total area of ​​the refrigerant through-hole, more heat can be carried away by the refrigerant, thereby lowering the temperature of the lubricating oil, reducing the lubricating oil's flow capacity, and further reducing lubricating oil discharge. Increasing the number of refrigerant through-holes helps to enhance the internal circulation of the motor and improve motor operating efficiency. Optimizing the shape of the refrigerant through-hole helps to improve the load-bearing capacity of the refrigerant through-hole, promote refrigerant flow, and improve motor efficiency.

[0038] Example 2

[0039] As a further optimization of Example 1, refer to Figure 2 The rotor core 1 has multiple magnet slots 14 evenly spaced along its circumference, and the refrigerant through hole 12 is located between the shaft mounting hole 11 and the magnet slot 14. Each magnet slot 14 can be regarded as a magnetic pole, and one or more permanent magnets can be placed in each magnet slot 14.

[0040] In this embodiment, the magnet slot 14 is V-shaped, and two permanent magnets can be placed in the magnet slot 14. This makes the magnetic field distribution more uniform, which is beneficial to improving the overall performance and operating efficiency of the motor. The number of magnet slots 14 is N2, preferably 8≤N2≤10, which helps to enhance the magnetic field strength, increase the motor torque, and thus improve the motor performance.

[0041] In some embodiments, the rotor core 1 is further provided with a magnetic isolation groove 15, which is located between the magnet groove 14 and the outer peripheral surface of the rotor core 1. Providing the magnetic isolation groove 15 can reduce magnetic leakage, improve motor efficiency, and improve the operational reliability of the motor.

[0042] Example 3

[0043] refer to Figure 3 The permanent magnet synchronous motor provided in this embodiment includes a stator 100, a rotating shaft 200 and a rotor 300 of embodiment 1 or 2. The stator 100 is sleeved on the outside of the rotor 300, and the rotating shaft 200 passes through the rotating shaft mounting hole 11, wherein the rotating shaft 200 is a crankshaft.

[0044] The stator 100 includes a stator core and multiple stator windings. The stator core has multiple stator teeth evenly spaced along the circumference, and stator slots are formed between two adjacent stator teeth. The number of stator windings and stator slots are matched with the number of stator teeth. Each stator winding is wound on a stator tooth and located in two stator slots on both sides of that stator tooth.

[0045] In this embodiment, the permanent magnet synchronous motor, by setting the rotor of Embodiment 1 or 2, changes the position of the refrigerant passage on the permanent magnet synchronous motor, so that the connection between the refrigerant passage on the permanent magnet synchronous motor and the refrigerant passage on the pump body assembly forms a certain bend, thereby blocking the lubricating oil carried by the refrigerant, reducing the discharge of lubricating oil, stabilizing the oil level of the compressor, and thus improving the operating performance of the compressor.

[0046] Example 4

[0047] refer to Figure 4 The compressor provided in this embodiment includes a pump body assembly 400 and a permanent magnet synchronous motor 500 as described in Embodiment 3. The pump body assembly 400 is drivenly connected to the rotating shaft 200 and rotates under the drive of the rotating shaft 200. The pump body assembly 400 includes a muffler, an upper support, a cylinder, and a lower support, which are sequentially sleeved on the rotating shaft 200 from top to bottom. An exhaust port is provided on the muffler.

[0048] In this embodiment, the exhaust port on the muffler is circular, and the distance between the center of the exhaust port and the rotating shaft 200 is greater than the outer diameter D3 of the annular area 13. This ensures that the exhaust port and the refrigerant through hole 12 are misaligned, effectively blocking the flow of lubricating oil, reducing the discharge of lubricating oil, thereby reducing the loss of lubricating oil, improving the stability of the compressor oil level, ensuring the reliability of compressor operation, and thus improving the operating performance of the compressor.

[0049] The compressor in this embodiment optimizes the refrigerant passage inside the compressor by setting the permanent magnet synchronous motor of Embodiment 3, effectively reducing the loss of lubricating oil and improving the stability of the oil level inside the compressor, so as to ensure the reliability and stability of the compressor operation and improve the operating performance of the compressor.

[0050] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A rotor characterized by, The rotor core (1) is provided with a rotating shaft mounting hole (11) at the center of the rotor core (1) and a plurality of refrigerant through holes (12) distributed around the outer periphery of the rotating shaft mounting hole (11). The outer periphery of the rotating shaft mounting hole (11) is provided with an annular setting area (13), and the plurality of refrigerant through holes (12) are located in the annular setting area (13), and the side of the refrigerant through hole (12) close to the rotating shaft mounting hole (11) is attached to the inner periphery of the annular setting area (13), and the side of the refrigerant through hole (12) away from the rotating shaft mounting hole (11) is attached to the outer periphery of the annular setting area (13). The hole diameter of the rotating shaft mounting hole (11) is D1, the inner diameter of the annular setting area (13) is D2, and the outer diameter of the annular setting area (13) is D3, and the rotor has a relationship: D1+3≤D2≤(D3+D1) / 2.

2. The rotor of claim 1, wherein The total area of the plurality of coolant through holes (12) is S, and the rotor has a relationship: 0.393 x D2 2 <S < 0.393 x (D2+D3) 2 .

3. The rotor of claim 1, wherein The number of refrigerant through holes (12) is N1, and N1≥4.

4. The rotor of claim 1, wherein The shape of the refrigerant through hole (12) is polygonal.

5. The rotor of claim 1, wherein The rotor core (1) is provided with a plurality of magnet grooves (14) along the circumference, and the refrigerant through hole (12) is located between the rotating shaft mounting hole (11) and the magnet groove (14).

6. The rotor of claim 5, wherein The magnet groove (14) is V-shaped.

7. The rotor of claim 5, wherein The number of magnet grooves (14) is N2, and the rotor has a relationship: 8≤N2≤10.

8. The rotor of claim 5, wherein The rotor core (1) is further provided with a magnetic separation groove (15) between the magnet groove (14) and the outer periphery of the rotor core (1).

9. A permanent magnet synchronous motor, characterized by, The stator (100) is provided on the outside of the rotor (300), and the rotating shaft (200) is provided in the rotating shaft mounting hole (11).

10. A compressor characterized by, The pump body assembly (400) is connected with the rotating shaft (200).

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